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watchdog: Fix rounding bug in get_sample_period() 

In get_sample_period(), softlockup_thresh is integer divided by
5 before the multiplication by NSEC_PER_SEC. This results in
softlockup_thresh being rounded down to the nearest integer
multiple of 5.

For example, a softlockup_thresh of 4 rounds down to 0.

Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Cc: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1306127423-3347-1-git-send-email-msb@chromium.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Mandeep Singh Baines 2011-05-22 22:10:20 -07:00 committed by Ingo Molnar
parent 3ac1bbcf13
commit 824c6b7f62
1 changed files with 1 additions and 1 deletions
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2
kernel/watchdog.c
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@ -110,7 +110,7 @@ static unsigned long get_sample_period(void)
* increment before the hardlockup detector generates
* a warning
*/
return softlockup_thresh / 5 * NSEC_PER_SEC;
return softlockup_thresh * (NSEC_PER_SEC / 5);
}
/* Commands for resetting the watchdog */